* {{cite book | last=Eiben | first=Agoston E. | title=Parallel Problem Solving from Nature - PPSN V | publisher=Springer Science & Business Media | publication-place=Berlin ; New York | date=1998-09-16 | isbn=3-540-65078-4}}
<ref name="i706">{{cite book | last=Eiben | first=Agoston E. | title=Parallel Problem Solving from Nature - PPSN V | publisher=Springer Science & Business Media | publication-place=Berlin ; New York | date=1998-09-16 | isbn=3-540-65078-4 | page=}}</ref>